15649238016 has 176 divisors, whose sum is σ = 46764943200. Its totient is φ = 5169217536.

The previous prime is 15649237993. The next prime is 15649238029. The reversal of 15649238016 is 61083294651.

15649238016 is a `hidden beast` number, since 1 + 564 + 9 + 2 + 3 + 80 + 1 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3121720 + ... + 3126728.

Almost surely, 2^15649238016 is an apocalyptic number.

15649238016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15649238016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23382471600).

15649238016 is an abundant number, since it is smaller than the sum of its proper divisors (31115705184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15649238016 is a wasteful number, since it uses less digits than its factorization.

15649238016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151 (or 5127 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 15649238016 in words is "fifteen billion, six hundred forty-nine million, two hundred thirty-eight thousand, sixteen".